QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

52 km SE of Marblemount, Washington

· 8.9 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Chelan County 47 kmSnohomish County 69 kmSkagit County 74 kmOkanogan County 91 kmWhatcom County 97 kmDouglas County 105 kmKing County 110 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.6 (md)
Depth
8.9 km below the surface
Felt
no reports yet
Nearest
Chelan County, 47 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1693 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 48.2475, -120.8822. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Chelan County, WA 47 km (29 mi) NNW of here earthquakes near Chelan County
Snohomish County, WA 69 km (43 mi) ENE of here earthquakes near Snohomish County
Skagit County, WA 74 km (46 mi) ESE of here earthquakes near Skagit County
Okanogan County, WA 91 km (56 mi) WSW of here earthquakes near Okanogan County
Whatcom County, WA 97 km (60 mi) SE of here earthquakes near Whatcom County
Douglas County, WA 105 km (65 mi) WNW of here earthquakes near Douglas County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

11 earthquakes have been recorded within 50 km since this one.

  1. 1.6 13 km WSW of Winthrop, Washington
  2. 1.7 23 km NW of Granite Falls, Washington
  3. 2.1 16 km ENE of Marblemount, Washington
  4. 1.7 14 km ENE of Marblemount, Washington
  5. 1.7 44 km WSW of Twisp, Washington
  6. 1.8 44 km WSW of Twisp, Washington
  7. 1.5 34 km ENE of Marblemount, Washington
  8. 1.6 26 km NNW of Leavenworth, Washington
  9. 1.9 10 km SE of Marblemount, Washington
  10. 1.8 46 km ENE of Marblemount, Washington
  11. 1.7 46 km WSW of Twisp, Washington

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.